Tone arm for craphophones



Feb. 27, 1923.

E. O. KLEIVI M.

I TONE ARM FOR GRAPHOPHONES.

FILED JULY 7. 1921.

v w W slight space between the arm 5 and the horizontal portion of thehinge member 8, which space is suiilcient to permit the play upwards anddownwards of the reproducer incident to the norn'ial turning of therecord carrier B with the record thereon, and incident to any suchmovement required by he warped condition of he record or record carrierproducing a sort o1 waving oi? the stylus in action.

I utilize a spring surrounding the pintle 7 and suitably attachei'l tothe parts 4% and 6 so as to act upon these parts to counterbalance theweightot the tone-arm 2, an effect which has been found desirable andwhich is utilized in a different in tonearm constructions at present inuse.

Figure 3 illustrates a niod-ilier'l adaptation of my invention wherein lutilize parts which correspond to those heretofore described, thetone-arm however being made in a continuous erm and having a swivel. orrotative connection at 14 provided by ballbearings mounted in a.suitable bail. e formed between the l5 the Q extremity elf the tone-aimand 1, member 16 applied to the ho "enta l portion 17 of the hinged leatl8. .Qhe leaf or plate 18 is of somewhat form and has the hearing;- at14. at the lower extremity of the 1 J1"; 9 i rlrl .s] k 1.0 il 19 7 toner111 a1 i. an a citiocii iearni (.t

t on die upper portion of the tone-arm ust above the elbow. The bearing19 is a simple point bearing of a conventional to in in itself. The leafor plate 18 is pivoted bv a .pintle 20* intermediate the ends of theverticzil portion of said plate to the'hinge menv l er 21 whichcorresponds very closely to the h nge member 8 of the constructionbefore described.

For certain types of phonographs it will.

be quite evident that the construction oi? Figure 3 alto (ls a verysimple, inevpensivc, and practical mode oi constructing; and supportingthe tone-arm device. The action of the parts as to movements isself-evident.

in Fir-are there shown a construction hinge member 252 and hinged leafor plate which. is almost idcutic; l. with FlQIiU'Gs Mid 2, save thatthe vertical. portions oli these parts are much attenuatei'l, as toextent. and proportion. In SK llllG types of grapbm phones theconstruction oi, Figure will be ill and effective to admit oi the found1 de sired moven'icnt of the touenrni and reprodu'cer required under'n'actical conditions of use,

lt wi l be (.ihseaei'veil that in effect the sleeve 3 is a continuationof the tone-arm 2 and I desired a continuous formation migrl'zt be iemployed within the purview of this inven tion. Furthermore, with inconstruction, a very slmple method or" connecting the reproducer 1 tothe tone-arm 2 may be emof the tone arm, the hinge comprising complemental parts, one attached to the base,

and arota-tive connection between the other part of the hinge and thetone-arm.

2 In meansfot the class described, the combination ot a. base support, atone-arm mounted tliereomand connection bet veen the base and tone-armcomprising a hinging device which consists of hinge member se cured tothe base and having an upstanding portion, a hinged lest carried by saidupstanding" por ion andprovided with an offsta-nding lateral arm, and atone-arm movably connected with said lateral arm. I

3. Means claimed. in clsim 2, combined with a pintle forming; a part outthe connection mentioned, and spring encirclin said pintle and engagingthe hinge member and lea-i" Ito counterbalance the tone-arm 41-.ln'means of the class described, the combination of abase, a tone-armvertically and downwardly extending; supporting element, a bearingsleeve to which said element is rotetively applied and a hingingdevicesupporting; the bearing sleeve and including a hinge ember secured tothe base, tog ;her with a hinged leaf pivoted to said hinge memberandhaving ottstanding arm. supportin saidbearing sleeve.

' 5. lvlieans c \ned in claim l wherein the hinge member has a baseextension wiich is attached to the base and is located beneath the e rof the hinged leaf, said two parts has registering openingstorm- 111;:continuations oi the sound passage of the tone-arm.

6. In a, machine of the class described, in combinatioma base having: asound. openthercthru, a 'tonenrni havini: the usual sound passagetherein, an rmed. with an elbow portion, a hinge device for the tonearincomprising-a hinge member secured to the base and having" an upstanding;arm, a hinged leai hi gzedly connected to said upstanding arm, andhaving: lateral arm. a s eeve b llliljj iii-ember carried by said armhaving rotative engagement with the lower portion oi" the elbow ot thetone-arm, the opening in the base, the sleeve bearing men her, and thesound. 5; being coextensive to :orm :1 continuous unobstructed EDl VINO. KLnMll/I. I

having; a

